Modern people are increasingly ceasing to use the services of modern telecommunications, which are distinguished by the high cost of calls and are not always convenient to use. Those accustomed to traditional telephone communication remained only in areas where civilization had not yet had time to reach them. Now more and more people use Internet services, so landline phones are no longer in demand. With a built-in Wi-Fi receiver in your mobile device, you can make calls all over the world, regardless of your location. You just need to find and connect to a Wi – Fi source to make a call. If you wish, you can use communication services via the Internet without spending additional funds on it. IP telephony is a modern form of communication that is developing rapidly, thanks to its comfort and accessibility. If you do not have an IP telephony provider in your city, you can connect to it via the Internet. You must have access to the Internet using a Wi-Fi router or modem. The advantages of